The Northern Ireland Assembly could be facing collapse.

It's after parties failed to agree a deal on the implementation of the Welfare Reforms Bill which contains cuts to services.

The row between Sinn Féin and the DUP has been rumbling on for several months and last night Sinn Féin and the SDLP refused to back the implementation of the legislation.

Sinn Féin's Alex Maskey's calling on David Cameron to intervene: